[R-390] Panel meters

[Curt Nixon]

I haven't looked at one directly, but one might add a "window" in the 
appropriate place in the case by drilling a hole and then plug the hole 
with a pc of white or clear translucent plastic rod.  A hobby store is 
your best friend for projects like this.  Maybe even replace one of the 
assembly screws with one of plastic then light it up from outside.

Just some ramblings.

Curt



rbethman wrote:
> Were it to be an "Ideal" world, we wouldn't have to make an opening in 
> the case of the meter at all.
>
> However, I don't really see a real way around it.
>
> Good news is that the LEDs on the market today have a VERY long life!
>
> Bob - N0DGN
>
> On 4/21/2011 4:00 PM, Curt Nixon wrote:
>   
>> Yes.
>>
>> A very small section of 1/8 dia or smaller clear acetal rod can be 
>> glued over the end after being "diffuesed" with some 400 grit wet or 
>> dry so it is frosted.  Even one of those very small LED lenses could 
>> be used..whatever will fit.
>>
>> Remember the 68-70 vintage corvettes that had fiber running into the 
>> dash so one could see if all the lights outside the vehicle were working?
>>
>> Curt
>>
>> Tisha Hayes wrote:
>>     
>>> You will probably need to add a blob of something to diffuse the 
>>> light from the end of the fiber strand. That is a great idea, less 
>>> intrusive, to use a small length of fiber to get illumination back 
>>> there. After all a single strand is only 125 micrometers in size 
>>> (with cladding, 62.5 micrometers when you bare it down to the glass 
>>> strand). (most commonly used multimode fiber)
>>>
>>> On Thu, Apr 21, 2011 at 1:59 PM, Curt Nixon <cptcurt at flash.net 
>>> <mailto:cptcurt at flash.net>> wrote:
>>>
>>>     Remember those little Christmas trees with a light in the bottom
>>>     and all the branches are plastic fiber?  An LED with a couple of
>>>     strands of FO on it will get into some pretty tight spots.  Makes
>>>     changing the LED very easy also and only tiney holes required, if
>>>     that, into the meter.
>>>
>>>     Curt
>>>     KU8L 
>>>       
>
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